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Patented Oct. 23, 1894.

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CYLINDER PRINTING MACHINE. No. 527,941. Patented 0ct. 23,1894.

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Patented Oct. 23; 1894.

w vmemeo UNITED STATES PATENT OFFICE...

JOHN BROOKS, OF PLAINFIELD, NEW JERSEY, AS SIGNOR TO THE POTTER PRINTING PRESS COMPANY, OF SAME PLACE.

CYLINDER PRINTING-MACHINE.-

SPECIFICATION forming part of Letters Patent No. 527,941, dated October 23, 1894.

Application filed December 21, 1893. Serial No. 494,316. (No model.)

To all whom it may concern:

Be it known that 1, JOHN BROOKS, a citizen of the United States of America, residing at Plainfield, Union county, and State of New Jersey, have invented certain new and useful Improvements in Cylinder Printing-Machines, of which the following is a specification.

This invention relates generally to cylinder [Q printing machines and particularly to the means by which the cylinder and form supporting device. are moved at uniform surface speed during the impression.

Various devices have heretofore been proposed by which the uniform surface speed of the impression cylinder and form bed during the taking of the impression has been sought; and it is the objectof the present invention to improve and simplify the mechanism by which this is accomplished.

The improved devices consist essentially of an impression cylinder and coacting form bed, and substantially a single driver with connections between said device and the cylinder and the bed by which the required uniform surface speed is obtained.

More specifically stated, the devices consist of a crank driven or reciprocated form bed, which bed is provided with a toothed rack adapted to rotate a pair of tooth wheels each of which wheels is arranged to rotate the impression cylinder in opposite directions with means for alternately connecting and disconnecting the tooth wheels with and from the 5 cylinder.

As a full understanding of the improvement may be best had from a detailed description of a practical embodiment of the invention, such description will now be given, ref- 40 erence being had to the accompanying drawings, in which-- Figure l is a side view of so much of a cyl-- inder printing machine as is necessary to a proper understanding of the improvement 5 embraced therein, Fig. 2 is a partial crosssection of the machine on the line 2, 2, of Fig. 1. Fig. 3 is a horizontal section looking downward taken on the line 3, 3, of Fig. 2. Fig.4 is a vertical cross-section on the line 4:, 4, of

Fig. 2, looking in the direction of the arrow.

Referring to saiddrawings it will be understood that the improvement is embodied for convenience of illustration in adouble or perfecting cylinder machine in which a suitable frame-work A has bearings for a first im- 5 pression cylinder B, a second impression cylinder C and a reciprocating form carrier or bed D. This particular machine is provided with a feeding in cylinder E adapted to re ceive sheets in the usual manner from a feed 5c board or other source of supply F, and with the second impression cylinder C there is shown a reciprocating delivery device G arranged to take the printed sheets from the second impression cylinder and carry them outward for piling or to or into some other delivery device such, for instance, as a folding mechanism. These several adjuncts or devices cooperating with the first or only impression cylinder may obviously be modi- 7o fied and substituted by other devices or instrumentalities known in this art without atfecting the essentialsof the present invention and are simply shown as forming part of one form of an embodiment of the improvements.

The form bed D is mounted in the usual manner not herein shown and is reciprocated back and forth by motion imparted to a traveling gear H through a connecting rod Iconnected to a crank wrist on a gear wheel J which in turn receives motion from a pinion K on the driving shaft L. The traveling gear H as usual meshes with a fixed rack M and with a rackN on the under side of'the form 8 bed.

The form bed D carries on its outer side a driving toothed rack 0, see Figs. 1 and 2, which is in constant gear with a pair of toothed wheels P, Q, Figs. 3 and 4 that are arranged on the inner side of the frame-work and secured to the inner ends of shafts p, q, that are held in suitable bearings in said framework. On these shafts p, 41,011 the outer side of the frameworkthere is loosely mounted 5 the toothed wheels P, Q, which in turn are in mesh with toothed wheels B, C, that are secured respectively, to the outer ends of the shafts of the first and second impression cylinders B, C, and which wheels B, C, are in mesh with one another. As both of the toothed wheels P, Q, are rotated simultaneously on each reciprocation of the form bed, it is necessary to provide means by which only the rotation of one wheel P or Q, as the case may be, is imparted'to the impression cylinder or one or the other of the impression cylinders. For this purpose the intermediate and loose wheels P, Q, are arranged to be alternately coupled to their respective shafts so that only one will be rotated from the driver during either a forward or backward reciprocation of the form bed. The means for thus transmitting the motion alternately of the wheels P, Q, consist of a pair of sliding clutch membersp, q, splined one on each shaft 19, q, and each having teeth or pins arranged to engage with notches or perforations in the intermediate wheels P, Q, and thus alternately connect and disconnect said wheels to their shafts. The position and operation of these clutch members are controlled by a suitably shaped cam R secured to the outer end of the shaft J carrying the wheel J, the intermediate connections between said cam and the clutch members being a pivoted double armed bell crank Randaconnect-ing rod R The ends of the arms of the bell crank carry studs engaging with peripheral grooves in the clutch members; and the connecting rod has rolls which embrace opposite sides of the cam R to partake positively of the motion transmitted by the cam without the aid of springs.

In the operation of the machine assuming the form bed to be returning or moving backward in the direction of the arrow 1, Figs. 1 and 4, the cam R has moved the clutch memberq, to clutch the intermediate Qto its shaft q while the other clutch member has disconnected the intermediate P from its shaft 19, so that notwithstanding the fact that both of the wheels P, Q, are rotated by this movement of the bed only the movement of the wheel Q, will be transmitted through the intermediate Q to the cylinder Wheel or Wheels 0, B, to rotate said cylinder or cylinders in harmony with the then direction of movement of the form bed. As the rotation of the cylinder or cylinders is had from the rack O on the bed and the driving and intermediate Wheels being of proper size the cylinder or cylinders necessarily move at the same surface speed as the bed. On the other or forward reciprocation of the form bed, the cam R having moved the clutch members 19, q, to disconnect the intermediate Q, from its shaft and to connect the intermediate P to its shaft the rotation of the wheel P will be transmitted through the intermediate P to the cylinder wheel or wheels B, (J, to rotate the cylinder or cylindersin harmony with the then movement of the bed.

As the cylinder or cylinders receive their motion from the form bed it is obvious that their motion will be wholly in unison therewith, that is to say, where the bed is recipro cated by a crank movement and hence has gradually accelerating and retarding movements with a dwell at the end of each reciprocatory movement that similar accelerating and retarding movements and dwells will be imparted to the cylinder or cylinders, so that perfect harmony of surface speed exists throughout the reciprocations of the bed.

It will be observed in the present embodiment that while either one of theintermediates P or Q, are disconnected from their shafts that they are idle in the sense that they do not serve to impart motion to their connected cylinder wheels but as they are in constant mesh with such Wheels the idle intermediate wheel will be rotated loosely on its shaft by reason of the positive rotation of the cylinder wheel with which it is in mesh. This particular construction is not absolutely essential so long as means are provided by which the cylinder wheels are never wholly disengaged from the driver such being the preferred arrangement.

In practice the impression cylinders will be provided with suitable lifting mechanism by which each cylinder will be alternately lifted out of the plane of impression while the other is lowered into the plane of impression. Such mechanism, however, is not herein shown,but may readily consist of the devices set forth in my Letters Patent No. 413,491, dated October 22, 1889, it being understood that in such lifting movements of the cylinders their wheels 13 C will not become disconnected from the intermediates P, Q

While a double cylinder printing machine has been shown and described-M c present improvement being perfectly adapted to such a machineit is obvious that the invention may be embodied in a single impression cylinder machine, the cylinder 0 by slight modification then becoming a delivery cylinder as is common; and that if the delivery cylinder be omitted or occupya different position from that shown, the cylinder wheel 0 may still remain in which case it will act simply as a second intermediate. It is not deemed essential in a single cylinder machine to provide the wheels Q, Q, and C, and the movable clutch member, but their use is preferred in that by the presenceof the wheel 0 timely movements may be imparted to other adjunctive devices cooperating with the rest of the machine.

While the plain crank movement has been herein shown and described it is obvious that the epicyclic movement set forth in my Letters Patent N0A89A31, dated January 3,1893, may be substituted therefor Without affecting the improvements.

In conclusion it is to be understood that the invention is not necessarily limited to the specific constructions and arrangements of mechanism shown, as it is obvious many changes may be made without materially affooting the invention. The connective and disconnective device interposed in the gear ing between the driver and the cylinder and on the cylinder out of mesh with said rack,

nonintermeshing intermediate gearing conmeeting each of the toothed wheels with the cylinder gear for rotating the cylinder, and

a connective and disconnective device interposed. between said pair of wheels and the cylinder gear whereby said pair of wheels alternately drive the cylinder, as set forth.

2. The combination with the two impression cylinders, and a reciprocating form bed carrying a rack, of a pair of toothed wheels each in constant engagement with said rack, a gear on each cylinder out of mesh with the rack, intermediate gearing connecting each i of the-toothed wheels with the two cylinder gears for rotating the cylinders alternately, and a connective and disconnective device interposed between said pairof Wheels and the cylinder gears whereby said pair of wheels alternately drive the cylinders, as set forth.

3. The combination with the impression cylinder, and a reciprocating form bed carrying a rack, of a pair of toothed wheels each in constant engagement with said rack, gearing connecting each of the said toothed wheels 3 5 with the cylinder, clutches for alternately connecting said pair of wheels to said. gearing, an arm connecting the movable members of each clutch for simultaneous movement, and positive means for moving the arm, as set forth.

4. The combination with the impression cylinder,and its gear, and a reciprocating form bed having a rack carried therewith, of a pair of toothed wheels each in constant engagement with the said rack, two other wheels for driving the cylinder gear and out of mesh with each other and the rack, clutches for alternately connecting said other wheels with the pair of wheels, and a single cam for moving the clutches, as set forth.

5. The combination with the impression cylinder and a reciprocating form bed having a rack carried therewith, of a pair of toothwheels each in constant engagement with said rack, two other wheels for driving the cylinder, clutches for alternately connecting said other wheels with the pair of wheels, a single arm for simultaneously moving the clutches and a cam for moving the arm, as set forth.

In witness whereof I have hereunto signed my name in the presence of two witnesses.

JOHN BROQKS.

Witnesses:

GEO-H. GRAHAM, H. N. Low. 

